Inventories (Tables)

3 Months Ended

Mar. 31, 2016

Inventory Disclosure [Abstract]

Components of inventories

The components of inventories were as follows:

	March 31, 2016		December 31, 2015
	(Dollars in millions)
Coal	$	64.5	$	76.5
Coke	6.7		8.8
Materials, supplies and other	36.5		36.5
Total inventories	$	107.7	$	121.8